Darryl Learie performed an eight-finger plank exercise without using
his thumbs. He performed the exercise while balancing 135 pounds of additional weight on his back and remained balanced in position for 18.87 seconds.
Darryl Learie performed a [plank exercise] on his fists with his arms
fully extended while carrying additional 182 pounds of weight on his
back, which is equivalent to his own body weight. :
Darryl Learie performed a four-finger [plank exercise] without using
his thumbs or pinkies while carrying 50 pounds of additional weight on
his back. He remained balanced in position for 24.32 seconds. :